I NEED THIS FOR EXCEL! There's been a few discussions about Excel on HN recently and it's such a major tool in so many organizations and keeping track of changes is a nightmare. Here's a classic example: - Budgeting model for company with ~10 employees and 8 departments. Model has 30 or so sheets. Tracks all assumptions on the revenue and expense sides. Great model, built well, works excellently. - CFO goes in and ch…
Essentially you just foreach sheet, foreach cell, if diff then highlight the cell. You are working with strictly defined data after all, not some hidden magic markup language like word-documents.